2 edition of Mapping genes controlling agronomically and economically important traits in barley found in the catalog.
Mapping genes controlling agronomically and economically important traits in barley
Jeremy Henry Bezant
Thesis (Ph.D) - University of Birmingham, School of Biological Sciences, Faculty of Science, 1996.
|Statement||by Jeremy Henry Bezant.|
markers associated with economic traits in unre-lated inbred lines of rice (Zhang et al. ). Of particular interest to rice breeders is the possibility of using existing germplasm resources for gene and allele discovery on the basis of association mapping strategies (Kruglyak ;Jorde;Farniretal. ). Understanding population. Specifically, research articles reporting on QTL mapping approaches for the dissection of the genetic control of crops traits (including, but not limited to, root and shoot development and physiology, transpiration, WUE, cellular homeostasis, photosynthesis-related traits, etc.) involved in the response to drought, or on the identification.
Only a single variant showed beneficial variation for yield from a wild barley allele, but positive effects were identified for the other traits examined, including positive variants for test weight on chromosomes 1H and 3H. The AB-NAM population is a novel resource to map agronomically important traits associated with wild barley by: The genetic map produced will also allow for localization of additional genes on the genetic map that were unable to be localized in previous high-density mapping efforts, which will allow Cited by:
For wheat, the rice (Oryza sativa) genome is of particular interest as rice and wheat belong to the same family, Poaceae. Based on comparisons of common markers on genetic linkage maps, wheat and rice genomes were reported to be very collinear, but detailed analyses at the micro level show many exceptions [19,27–31].Cited by: Association mapping 1. • Hifzur Rahman 2. Methods in Crop Improvement• To meet the food needs of the human population, plant breeders select for agronomically important trais like yield.• Determining the genetic basis of economically important complex traits .
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Barley allele, but positive effects were identified for the other traits examined, including positive variants for test weight on chromosomes 1H and 3H. The AB-NAM population is a novel resource to map agronomically important traits associated with wild barley alleles. L.M. Nice, K.P. Smith, and G.J.
Muehlbauer, Dep. of Agronomy andCited by: In the case of barley cultivars, it is known that phytohormones regulate agronomically important traits (Marzec and Alqudah ).
However, there are still many unknowns, including barley. Results also indicate that genes for agronomically important traits may be found in the same chromosomal positions in barley and wheat. Wheat is a hexaploid and is more difficult to analyze genetically and molecularly.
These results indicate that barley may be used to identify and clone genes controlling agronomically important traits in wheat. Increasing the yield of barley (Hordeum vulgare L.) is a main breeding goal in developing barley cultivars.
A high density genetic linkage map containing SNP and 68 SSR markers covering cM was constructed and used for mapping quantitative traits.
A late-generation double haploid population (DH) derived from the Huaai 11 × Huadamai 6 cross Cited by: A set of modern spring barley cultivars was explored for the extent of linkage disequilibrium (LD) between genes governing traits and nearby marker alleles.
Associations of agronomically relevant traits (days to heading, plant height), resistance traits (leaf rust, barley yellow dwarf virus (BYD)), and morphological traits (rachilla hair length, lodicule size) with Cited by: Later the studies on the identification and molecular-genetic mapping of QTLs determining morphological and agronomically important traits of bread wheat.
The study for genetic control of quantitative traits of importance for genetic im-provement has been based on the establishment of a generation and diallel analysis. These genetic-statistical methodologies allow the evaluation of the gene that determines the trait under study, leading to conclusions about the existing types of gene action.
Among. At present, association mapping has been widely used in studies of many plants, such as maizebarley 6, wheatetc. Association mapping studies in bread wheat are extended to several agronomic traits, such as grain yield, the quantity of a high molecular-weight glutenin and disease resistance 7,by: Map-based cloning has made it possible to isolate useful genes governing important agronomic traits and the incorporation of these genes into elite rice cultivars through transformation.
Advances in tissue culture and molecular marker technology have resulted in broadening of the gene pool of rice and have enhanced the efficiency of. The RIL mapping populations considered in the consensus map were used previously for detecting QTLs of agronomically important traits.
These are displayed in Figure 1, together with the QTLs identified in the improved Vf6 × Vf map Cited by: Bread wheat chromosome 3A has been shown to contain genes/QTLs controlling grain yield and other agronomic traits.
The objectives of this study were to generate high-density physical and genetic-linkage maps of wheat homoeologous group 3 chromosomes and reveal the physical locations of genes/QTLs controlling yield and its component traits, as well as agronomic traits Cited by: Scientists at the National Institute of Agricultural Botany (NIAB) have identified the genes that encode important visible differences in barley.
The breakthrough is a major step forward in unravelling the genetic determinants controlling traits. Using leaf osmotic potential and plant survival rate as chilling-tolerant trait indices, we identified two major quantitative trait loci qLOP2 and qPSR2 - 1 (kb region) and Os02g as the cold-inducible gene for these loci.
Chilling stress tolerance (CST) at the seedling stage is an important trait affecting rice production in temperate climate and high Cited by: Determining the genetic basis of agronomic traits has been one of the major scientific challenges in the process of crop improvement.
Most of the agronomically important traits are quantitative, resulting in greater difficulty for dis-cerning genetic differences underlying the phenotype of interest.
Currently, linkage mapping (analysis) is the. Barley (Hordeum vulgare), first domesticated in the Near East, is a well-studied crop in terms of genetics, genomics, and breeding and qualifies as a model plant for Triticeae research.
Recent advances made in barley genomics mainly include the following: (i) rapid accumulation of EST sequence data, (ii) growing number of studies on transcriptome, proteome, and metabolome, Cited by: In barley, however, the impact of the semi-dwarfing genes on agronomical success of modern varieties still remains uncertain.
Two dwarfing genes, sdw1/denso and uzu1.a involved, respectively, in the metabolism of the GA and brassinosteroid hormones, were designated as “the Green Revolution” genes in barley [ 4 ].Cited by: 1. Functional markers will also be useful for (i) association studies based on linkage disequilibrium, (ii) detection of cis and trans-acting regulators either based on genetical genomics studies using well-defined mapping populations or by investigating allelic imbalance, (iii) identification of alleles influencing agronomically important traits using TILLING/EcoTilling approaches (EcoTilling is a means to determine the extent of natural variation in selected genes Cited by: Understanding and manipulating the genes that determine economically important traits will enhance the profitability of U.S.
barley production. The NABGP developed extensive germplasm and molecular resources for genetic mapping. Core mapping populations are supported by a spectrum of specialized germplasm resources.
Most of the economically important traits in rice are quantitatively inherited in genetic manner Combination of association and pedigree-based studies was a good approach to identify small and Author: Hein Zaw, Chitra Raghavan, Arnel Pocsedio, B.
Mallikarjuna Swamy, Mona Liza Jubay, Rakesh Kumar S. Here, we clone the wheat (Triticum aestivum L.) homologue of the rice PSTOL gene (OsPSTOL), and characterize its role in phosphate nutrition plus other agronomically important traits.
TaPSTOL is a single copy gene located on the short arm of chromosome 5A, encoding a putative kinase protein, and shares a high level of sequence similarity to Cited by: 6.
The identification of wheat and barley genes controlling important agronomic traits using positional cloning has traditionally been a challenging and time-consuming procedure. This is due to the enormous genome size and high repeat content from transposable elements (TEs).graminae species such as wheat, barley, rye, oat and maize.
Hence, mapping of genes/QTLs of agronomic importance in rice can be expected to have positive impact on several of the most important cereal crops in the world (McCouch and Doerge, ). Most of the economically important traits are polygenic in nature.
Useful genetic variation for barley breeding can be now connected to the assembled catalog of gene sequences, increasing the precision and speed of barley improvement.
The Barley CAP and TCAP are successful examples of collaborative approaches to breeding that have resulted in a rapid exploitation of barley genetic resources for crop Cited by: